Open-hearth furnace.



o. SIMMBRSBAGH.

.OPEN HEARTH PUBNAGE. l

`APPLICATION FILED 119.31, 1912.

O. 'SIMMBRSBAGE OPEN HEARTS PURNAGE. APPLIOATION H'LBD um. a1, 1912,

1,090,503. Patented Mar. 17,1914. zl slums-SHEET 2.

Ynot 'very Successful in the ease @SCAR SIMMVESBACH, BRESLAU, GERMANY.

PEN-HEARTH FURNA CE.

Specification of Letters Patent.

rammen Mai. i f7, ioni.

Application led August 31, 1912. Serial No. 718,015.

Bo it ltnoun that I, @soria SIMMERSBACH, a sulaject of the German Emperor, and resident of Breslau. Germany, havev invented certain new `and useful Improvements in (JpeIvHt-artli Furnaces, of which the tol.

lowing is a specification.I

My present invention relates to rev; iberatory furnaces of the,Siemens-Martin type, the Talbot type, or like construction. Such furnaces were fr inerly heated, is a rule, by 'means of producer gas, which is relativelyv poor in,hydrocarbons, but the recent practice has been to employ relatively rich in hydrocarbons, for instance the gi produced in coke ovens. ln passing through the furnace chamber, this gas tends to rise to the roof or top `wall of 'the furnace, thus exposing thefurnace arch to destruction, particularly as the combustion ot colte oven gases producesa much higher tcn'iperature than the conibnstion of producer gas. -litherto yit has been eiuleavorcd to throw the llame down upon the molten metal as far ihle. by givin-g a corresgviondiugly strong inclination to the aii'supply channels which are located above the gas-supply channels. This arrangement,

hovmver, is of large furnaces supplied with cold fuel (gas), since theY llame will be thrown down only in the part or half of the furnace nearest the fuel and air inlets. In the second half of the furnace the gas rises again, since the Wastegases proceeded to the regenerator on that side of the furnace which is temporarily the outlet side, only through the air-supply channel, which, as stated, is located at a high level. ln order to avoid these drawbacks, vl have supplied reverberatory furnaces of the type named (llartin, Talbot, or the like), Ywith auxiliary air-supply channels, or with a single such channel, located laterally of ythe "ou iai-y fuelsupply channel or channels, it being understood that these auxiliary channels areiadditional to the gasfiuppiy channel or channels and to the customary aiisu;.\ pi v channel or channels located at each endor head of the furnace, above the fuel-supply channel or channels. 'll'ih this novel arrangement, the wastehasta can pass out, not only through the VIAin air-supply channel located in the lliiu upper hart ot the furnace head, but also ihrough the auxiliary air-supply channels situated hutslightly above the level of the molten metal. The flame is thus compelled to travel close to the surface of the metal, even in the part of the furnace adjacent to the outlet, and is prevented from rising to the arch or roof and destroying it. The provision of these auxiliary air-supply channels also insures a thorough and rapid mixture. of the fuel or heating gas with the air provided to support combustion, and the comlulstion of the mixture is thus promoted, so that the gases will be consumed conipletely within the furnace and cannot pass out in an imperfectly consumed condition into the head at the opposite side of the furnace, with the attending danger of coinbustion occurring in the furnace head or even in the regenerators, which of cou-rse would be highly detrimental 'to the heads and end or face walls of the furnace. 'llhe improvement in the mixture and conihus1 tion within the furnace has the further advantage. of reducing the interval of time be tween successive charging operations,

Another feature of this invention consists in the provision of one or more dainpers' or `other devices for throttling the passage of the gases through the main air-supply channel. rThese danipers or throttling devices are preferably arranged in the air-distributingl channel provided in each furnace head, or in the main air-supply channel located ahove the fuel-supply channel or channels. The Waste-gases are thus compelled to pass in a. larger proportion through the auxiliary airsupply channels located slightly above the level ot' the molten metal, and thus l insure the passing of the flame close to the surface of the metal, even at the outlet side ofthe furnace.

The advantages pointed out above are also secured when auxiliary air-supply channels of the character set forth are applied to reverberatory furnaces (Martin, Talbot, or the like) heated luy means of producer gases. ln this case ,the'provision of the auxiliary air-supply channels saves the furnace arch and the furnace heads from excessive Wear, and besides, the combustion is improved and the interval between charging operations is shortened. L

ln the accompanying drawings l have .l'gl'lustrated the application of my invention to a` Martin furnace, it, being understood that this is only an example, and that the invention may be carried out in many other ways.

Figure 1 is a longitudinal vertical section ofi', thus disconnecting the conduit Q0 from takenchiefiy on line 11 of Fig. 52, but the valve 21.

. tate repairs considerably.

some parts are shown in 'section `on lines In each of the urnace heads 8. four slit- 1L1 and 1"-1b respectively of Fig. Q; like auxiliary air-supply channels 25 lead Fig. 2 is a vertical cross section on line Q- downward at an incline, from the main air- 70 of Fig. 1, drawn upon an enlarged scale; supply channel 16 and from the air-dis- Fig. 3 is a vertical cross section taken on tributing channel 15, to the chamber 2. The line 3-3 of Fig.. 1 and showing the furnace lower portions or surfaces 26 of these aux` head upon an enlarged scale; Fig.`4 is, in iliary channels 25 are at the same level mitv its upper part, a cross section online 4-4 the lower surfaces of the fuel-supply chan-*115 of Fig. 1, and in its lower part., a cross seclnels 1T, so that the lower portions of the tion online 1W-4 of Fig. 1, the entire view channels 25 are situated laterally of the being on a larger scale than Fig. 1; and (channels 17 and, like the latter, have theirv Fig. 5 is a'vertical `section on line 5-5 of orifices in the ,furnace chamber 2 imme- Fig. 1. diately above the surface of the moltenlgo The central part 1 of the .furnace has its metal. 'The channels 1'( and Q5 are so arinterior chamber 2 bounded above by the ranged in the head S that an auxiliary airarch 3 and below by the trough-shaped botsupply .channel 25 will follow a gassupply toinli which receives the molten inetal. This Channel 1T, in regular alternation. (See furnace part 1 is supported by means of car- Fig. 3). iiers5 and posts 6 upon abase or foundation On the upper surfaces QS of those head 7. Thetwo furnace heads 8, of like conportions which lie between theauxiliary air'- strucion. are mounted on trucks 9 having supply .channels danipers or lchrottling wheels 10 adapted to travel on stationary y devices 29 are provided. 'hen air to sup-v traclrs 11, so that each of the furnace heads port combustion passes through the respec- 90 may be moved away from the central furtive channel 16, these throttling devices are nace part 1, which arrangement will 'aciliretracted to such an extent that they will lproject from openings 30 provided in the head and receiving said devices with atight fit.y When however the wastegases are'to 95 pass 'out through the channel 16, the throt- At the ends of the furnace iegcnerators 12 are provided in the base of the furnace, these regeneratora serving to heat the air intended to support combustion.v The' retling devicesr are pushed in on the surfaces generators contain the customaryY checker- 28 to such an extent that their front edges, work and are adapted to be connected ulterl faCing the Center of the furnace, will regnatelj: with a chinincy and directly with the f, ister with the outer end of the channel 16, 410() Surrounding: nir, bv means of a reversing ibut '1S t0 say, SUCh'deViCeS Will in this' Case valve oiany well-known or approved tonl lie at the junctionv of the channels 15 and struc-tion. Such valve is not shown in the 16, as shown at the right in Fig. 1; at, the drawings. Two channel-y 13 (1? igs. 1 and lett, Fig. 1 illustrates'the position first ref l- 2) lead upward from each of the regeneral ierred to above. With tli e throttling des, if; tors 12. YYhen the 'tui-nace headsl S are in l vices 29in their inner positions, the open-' their operative position (against the central ings 30 are closed by means of tightly fitting part 1), the channels lil communicate with cmovable plugs 31. Eyes 32 and 33 respecl two vertical channels: 14- provided 'in enen tively are provided on the dampers '29 und ot the heads and these channels l-lare plugs 31 (Fig. 4), SO that lOOk-lke 100k, 110 connected with a transverse air-distributing introduced from the outside, may he emcliannel 15 located in ine upper portion ot ployed to shift the dampers and plugs to each head S. li'oni thisl transverse channel 3 the desired position. A 151. the rnain air-supply channel it; i; nx.' The Mart-in furnace described above is tended downward at a greater or smaller iii- "Pfl'ld: 51S OUGWSZ In the POSlUIl ShOWll 1l!g clination within the head r to the chamber in Fig'. 1 ihe gas valve 21 at the. left-hand :2 of the furnace. portion of the furnace" is open and the gas Beneath each oi' the n'niin air-sul'vply YlllYL2lutiihoi'ightisclosed. The reversing channels 1G the i'urnace liv-.nis contain `litvalve (noty shown) C'onllOCed'Wlh like tWO like uehsupplv channels 1T. each head he l've'enerati'irs 12 is adjusted to Coli'll'cCt th! '120 ing provdml with three finch Chimney-,- 17,' leifthand .regenerator' 12 directly with the r'ipen at one end to the chamber-'2 and con- 5 r-uiioiiu luig air and the right-hand regenernected at the other end with a. gas conduit i :uur 1-3 with the chimney.' The throttling 20 secured to the head bj: means-ot brackets i devices h of the left furnace portion are 19 (Fig. il). The gas conduit Q0 is connected l ret-acted as described, and the'throttlingllg; .with a stationari` supply pipe or main Q2. f devices oi the righthand portion .o a, `valve 21 controllingv this connection. the tui-nace arepushed in or forward (seo. "When one of the furnace heads to he Fig. l). The air preheated in the left-hand moved away from the central part 1, the regenerator 12h15 contact with the chcckeiif'.y screws Q3 holding the iiaiiges Q1- arc taken i work heated by the'passage of the iiniate-E "n grises during the preceding period-travels .upward in the corresponding channels 13 of the furnace base, and pus-sing through the corresponding nir-distribiflting channel 15, reaches the main nir-supply channel 1G and the auxiliary air-supply channels 25 of the left-linnd head S. 'llirough the channels 1G, Q5 the air 'tor supporting' 'combustion llons into the furnace chamber 2, and becoming inixed with the entering through the guseupply channel;-, l? of the left-hand lieud, it is consumed with such t Will lie chservcd thut the air Streams into 'the furnace clnnnlier 2 not only through the main uireiipplj'; channel 1G situated above l fsupply channels 17j but furthe auxiliary nir-eupply chun- .nels locutcil lsil'crully off the gne-supply channels 1T, or hctn'een adjacent grisupply cl'ninnels. mixture. if the un.' with the und is cen'iplete n combustion ne pO/hlc, fithin the furnace proper.

ln ihc .turnuce c nnnlicr. if., the thune trlii'cls lo lhe ri itlizznd idc nt the inmune, close 'iufc of the nioltcn inelul. The

cbc-ripe tlnoi "l i 'rhone chunnele lit-lnzignl 'liurnn'c head which flurngg I; operation have served :is niivwpiiily (thinning und tuus reach lllie rcfutur 1&2 :u ilicriglit-lnind sideM The @es lrrtw nel; only through the un i' channel ll? ci "he rifhtnirffunply ein furnace heuil. nts rising in lh-c if( porti. nur-c clnnuhcr 2 and destroui'ingj` its roof or nrcli. (ln the crinif'ii'y, the liuine is coniiielled to trixvel el lo 'the surface of the nietzil, in thoriglit-linnl porlionef the fun nece. clnui'i'ccr :isi/f. '.l'liieI direction of the lluine is'lnrtlur fieieil'fleifl in the right-hund jiwi-tion et llie 'turinicc by the dempers er ihrcligl' devices Elf), which nt the iight hund head dre pushed in lo the junction of he airlistij'ilnuinn' cninnel with the inuin iiif-eup'ily channel 1S. 'liese devices throtflc the :ige et' the Weste-gases through the inurl lli, So that the, larger port' ni ot tlxf einer, will tend 'to take if4 pull; throng the :nixllinry nir-supply channels Q5 locutcd in'nncdiately adjacent te lhe sa P i Ve l eful y l) lod of fitter reversal el the course of :ii-a ii'cuuiicd. operai son {ihut :inter Il Mmm .L L Aduc C1 Wever troni r i gli l l 'thus secure zi'very tlioronglr gas entering through the channels 16, 25 end 17 respectively or' the right-hand furnace head 8, While the Waste-gases leere through the channels 16, 25 of the .left-hund tui-nece heed. i

The number of vgas-Supply channels 1T and of auxiliary nir-sugply channels 25 muy be varied Without effecting the spirit of iny invention. l

The conetruction, fu-rangement, and nuinber of the throttling devices Q9 muy' be modilied in Yarioue Ways.

The ubeve-described urrznigenient of nuxiliury air-Supply chunnels Q5 muy be employed with ndvnntuge in the euse of Mai'- tin furnnceshrlulbct furnuccs, or like re- 'i'erlierurory furnaces, not only in the event of prcheating' the nir alone, asin the exzunple described, but also in enses where both gus und air are preheated in regenerators.

lf cluiin as my invention:

1. reverliieratory furnace provided in its hczul with u fnelfnipply channel, u main eirsujnoly channel located nt a higher level than the seid fuel-supply cninnel7 and auf(- iliury air-supply channels located zit each side of the iuel-supply channel, ut practicnlly the mine leveltherewith.

Q. fr rcverliemtory furnace provided in its head with n 'lirici-supply channel, :i mein airsnpply chunncl located :it a. higher level than the Suid fuel-supply channel, auxiliary airsuijiply channels located lett-rally of the fuell `ily chunnel nl'. euch Side thereeif and at ijirncticully the annie level therewith, and :in zuljueluble device t'or throttling the passngge el 'nete-gases through the matin ein Supply channel.

8. A, rcverbcrntory furnace povided in its head with lower cliunnels located at practically the saine level, alternate channels being connected with a supply of fuel and ci. nir respectively, und an additional :tir-supply channel locuted at u. higher level than thc Suid loweu channels.

Ll. A fu fnnce ol' 'the reversible regenerar` 'tire type7 provided with a ilmnc chamber und .ith clninnelss located at each Side outl seid chamber anal opening directly into said clnnnher :it flillercnt levels, Suid channels lic-ing' :ui :ipted to Serve alternately, during eucceesive operutione, for the supply of air und for the escano or' combustion products rcepectivoly. und additional channels, located laterally et the lower ones of' the firstinnned channels und :it practically the suine level therewith, Suid additional channels bc- I inn' adapted to Serve 'for Supplying' fuel.

fru'nucc oli' the rcvcre'inle regenerative tying provided with. n. flume. chmnher inl with channels located :it euch Side of .ez-iid eliuinlwi und ut dillercnt levels, said @Munch` lining mlctptcd to Serve alternately, during Successive eperntions, for the Supply lof heated air and for the escape of combusthe irsonanied tion protiuets. respectively, additional cliennels, adapted to supply fuel to seid Chmnbei', located laterallyof the lower ones of ehamiels and et practically thesame level therewith, and throttlng cleviees locetecl'in'tlie upper channels, for verably proportioning the amounts of Lornbns-l r tion'produetsflowing-througla the upper and the lower channels respectively,

ff., A reverberatory urneee provided with 'et the other end respectively;

e flame chamber and with channels 'oonnected directlywitli opposite yends of said chamber, each set of channels comprising an upper channel Whieh at one end of the furnace serves for the main supply of ail', und for the escape of a portion of l,theWaste-gases., each set also comprising lower channels located side by side at practically the same level,.tl1e lowerehannels at one end. of the furnace serving, in alternate arrangement, for the snpply'of fuel and for en auxiliary nir-supply, While at the other end of the furnace the lower eliannelsfeorrespending to the auxiliary air-snpply' channels of the opposite end serve to carry of the other portion of the Waste-gasemat a level close to the surface of the meterialin the flame ehan'loer.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing Witnesses.

osoA-n srMMensBAon-.x 

